.dialogue {
    width: 680px;
    margin-left: 20%;
}
.dialogue .th {
    height: 22px;
    font-size: 16px;
    color: #333;
    padding: 10px 0 10px;
}
.dialogue .th .icon {
    width: 22px;
    height: 22px;
    background: url(https://css.mafengwo.net/images/message/pop_icon.png) no-repeat 0 0;
    float: right;
    cursor: pointer;
}
.th .news {
    font-size: 12px;
    color: #999;
}
.th .news .checkbox {
    width: 16px;
    height: 16px;
    background: url(https://css.mafengwo.net/images/message/select_icon.png) no-repeat 0 0;
    display: inline-block;
    vertical-align: -3px;
    margin-left: 30px;
    cursor: pointer;
}
.th .news .checkbox.on {
    background-position: -16px 0;
}
.dia_list .item {
    background: #fff;
    width: 640px;
    border: 1px solid #e5e5e5;
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
    -webkit-transition: box-shadow 0.25s linear 0s;
    transition: box-shadow 0.25s linear 0s;
    cursor: pointer;
}
.dia_list .item:hover {
    border-color: #fc9c27;
    box-shadow: 0 0 5px #ffa200;
}
.dia_list .item .author {
    width: 48px;
    height: 48px;
    float: left;
    border-radius: 50%;
    float: left;
}
.dia_list .item .con {
    width: 510px;
    padding-left: 20px;
    float: left;
    font-size: 14px;
}
.dia_list .title {
    line-height: 24px;
    margin: -5px 0 5px 0;
}
.dia_list .title .name {
    color: #ff9d00;
    display: inline-block;
    margin-right: 5px;
}
.dia_list .title .time {
    float: right;
}
.dia_list .con p {
    line-height: 24px;
    color: #999;
}
.dia_list .item .tool_right {
    float: right;
    width: 60px;
    text-align: right;
}
.dia_list .tool_right .delete {
    width: 9px;
    height: 9px;
    background: url(https://css.mafengwo.net/images/message/delete.png);
    display: block;
    margin-left: 51px;
}
.dia_list .tool_right .tips {
    padding: 0 7px;
    font-size: 12px;
    color: #fff;
    height: 15px;
    line-height: 15px;
    background-color: #ff9d00;
    border-radius: 5px;
    display: inline-block;
    margin-top: 20px;
}